.screen-1{
    background-color: #0f0f0f;
    width:100%;
    height:100vh;
}
.screen-2{
    background-color: #2aabd2;
    width:100%;
    height:100vh;
}
.screen-3{
    background-color: #2b542c;
    width:100%;
    height:100vh;
}